Cut four triangles from a square as shown in the picture. How many
different shapes can you make by fitting the four triangles back
together?

Rod Ratios

Stage: 2 Challenge Level:

Can you use the interactivity to help you? You can choose the
correct length rods from the interactivity by matching their
colours.
Perhaps you could line up white rods alongside the coloured rods to
help work out their lengths and then their relative ratios.
You could also use the grid lines to find the lengths of the
rods.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities
can be found here.